/Engine/Source/Runtime/Core/Public/Internationalization/TextLocalizationResource.h
Given a localization category, get the native culture for the targets for that category (if known).
The native culture for the given localization category, or an empty string if the native culture is unknown.
namespace TextLocalizationResourceUtil { [FString](API\Runtime\Core\Containers\FString) TextLocalizationResourceUtil::GetNativeCultureName ( const ELocalizedTextSourceCategory InCategory ) }